Düsseldorf 2007 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 48: Photonik I
Q 48.8: Vortrag
Mittwoch, 21. März 2007, 18:15–18:30, 5J
A Tunable Whispering-Gallery-Mode Bottle Resonator — •Michael Pöllinger1,2, Florian Warken1, Wolfgang Alt1, Dieter Meschede1, and Arno Rauschenbeutel1,2 — 1Institut für Angewandte Physik, Universität Bonn, Wegelerstr. 8, 53115 Bonn — 2Institut für Physik, Universität Mainz, Staudingerweg 7, 55128 Mainz
Bottle resonators, i.e., highly prolate-shaped whispering gallery mode microresonators, have a number of advantageous properties [1]. They exhibit two spatially well-separated regions with enhanced field strength and the field per photon on the resonator surface is significantly higher than, e.g., for equatorial whispering-gallery-modes in microsphere resonators with a comparable mode volume. At the same time, the frequency spacing of these modes is much more favorable.
We experimentally realize and spectroscopically investigate such bottle resonators. In agreement with the theoretical predictions, the mode spectrum exhibits a free spectral range one order of magnitude smaller than in comparable microsphere resonators. By applying mechanical strain with a low-voltage piezoelectric actuator, we were therefore able to tune the resonance frequencies over more than one free spectral range, making tuning to any arbitrary resonance frequency possible.
We acknowledge financial support by the DFG research unit 557.
[1] Y. Louyer, D. Meschede, and A. Rauschenbeutel, Phys. Rev. A 72, 031801(R) (2005).